Machine tool



Junell, 1940. F. GAlTzscH MACHINE/,TOOL

Y Filed Feb. 25, 1938 Patented June 121,'19'40 l v y UNITED s-'rnresy PATliz'liilf oF-rlcg ,'ln GcrmanyMarch3, 1837 3 Claims. (Cl. f7-w25). This'invention relates `to @machine toolhaving has a .collar 20 "braced-by the inner edge of a va rotary tool lcarrier headgin whichl tool spindles holding ring 2I"whi`chis.connected with the cenare arranged radially' to' the-axis there'oi.' f terin'g ring 2 by-'ajthread 22, so that the ring 2l In order successively 'and satisfactorily'to'drive --`c an be :adjusted 'by turning .relative'tcthe ring l a plurality of tool spindles arranged transverselyA 2 and theirln'gl I8 is jheld to the ring 2 without 5 to the axis of the tool carrier head byA means ofj playj,",..though;fin',aesllghtly rotatable-manner; spur gears, incont'radistinction to known con: jThe general 'arrangementistherefore such that structions, the invention provides. inl a Abearing Vwherr'thejtool-carrier-headl I1 is' turned the auxbracket disposed in themachine frame and en iliar-y: shafts I4f travel. in li-horizontal plane, circled by the tool carrier head a drivingshaft whichfisfalsoan'axial plane of the shaft 4, about i which vis transversely positioned vto the pivot of theshaftl and-are. thusl successively adjustable the tool carrier head and capable of being cou-v relativeto. the .end of theshaftl 'provided with pled with the tool spindle'coaxially adjusted to it the claws 'I8 tobe coupled V'with the shaft by an or with an auxiliary spindle driving shaft clisv axial displacement thereof.` i v 1l posed in the tool carrier head above, beside or be- DiSiilfcenlenlof theshaft 4. is .effected in known l5 low the spindle concerned.. ymanner vby'rn'eans` oi a fork 23 whichis movably By way lof example, one form ofthe' invention dlSposed-on -thebra'cket I. .with the'a'id of a-shatt is illustrated in the accompanying drawing, in 24frecta'ngularly positioned tol and above the .which Figure 1 is an axial section of the-tool car- Shaftjl. 1 The fork 23 can be held in any DOSitiOn rier and of the driving means associated thereby a .belt 25. WhOSeedge engages-one of the clear- 20 with; Fig. 2, a side viewv ofthe control ylever; i antes 2S', 2'I'provided inthe b'ossof the fork 2l.

and Fig. `3, a plan ofthe control means for'the. e fork 28 further supports an upwardly di.V tool carrier; rected pin 28 .to which the bellmember 30 is' The bearing bracket I is .firmly connected with Secured the -external surface of which has the.

` 9.5 the machine frame 3 by means ofthe centering 01111 0f 9 Spherical Segment about that Peint 0f 25 ring 2. In the bracket I, at 5 and 8, the tool* `the axis of themember 24 at which this axis is driving shaft 4 is rotatably and axially displace- 'iliter,Settledv by the aXiS of' rotation of the toolv ably arranged. A toothed wheel 1 secured to the ca lilel'head l1'. -The bell member 30 serves for shaft `4 engages a :toothed'wheel 8` whose teeth 51051118 an Opening in a eovel 3| firmly connected so are broeder then those of the wneeii to enable vwith theltool carrier head I1 and shutting it .".o the wheel 1 t0 cooperatevinthe axial displaceoff on top, wherebythe bearing bracket I is promentsl of the shaftv 4 without getting out ofmesh tected against dust and withdrawn from sight. f y'with the wheel 8 which isattached'to a shaft'8 1 T0 the. 11ppel"nn8e ,33 of the bell member 30 rotatably but not axially displaceably disposed in 'a bearing 111118 34 iSvSeCU-led by screwing and holds the bracket l, The toothed wheel s is'lnrmly the bushing 35 in such manner that it is rotatable 3:;

connected with -the bevel gear I0 meshing with a relative t0 the ben 3 and the bracket bevel 1 gear II which is supported by a shaft I2 The bi1-Shing 35 has two bosses 35, I1 in which rotatably arranged inthe bracket I and directly tubular lei/e1' 33 iS larritiiged. Through the or indirectly driven by a motor. Instead of uslever v38 extends a rod 38 whose free end projects 40 ingthe bevel gears I0, I.I one could drivel also likefa 'knob from E 'Spherical handle'lll' which 40 the shafts 4, 9 vfrom the motor shaft by means Completes the1ever-38- '.The member 35 possesses of a V-belt drive or pair of helical gears. i va central perforation 4I in which the lower end At one end of the shaft 4 claws I3 are provided -of the rod 38 can be inserted by depression 0f its 'for alternately coupling thev shaft .4 with aux- `end .projecting from the handle 40. Owing to this l iliary shafts carrying the tools to be driven, as arrangement, the lever 38. canbe coupled with the 45 with the tool spindle I4, to the free end of which bell member 30'a'nd thus with the fork 23 in such the tool, for instance a cutter, can be securedby manner that the motion of the lever 88 about meansof a nut I5. Each of the auxiliary shafts" the axis of the pin 24 istransmitted to the fork I4 to be successively 'connected with the-shaft 2l andthereby the shaft 4.displaced in axial di- 4 has aprojection I6 which tsbetween the claws rection, whereby itis coupled with, or uncoupled 50 I3. The auxiliary shafts I4 are disposed in the 1mm; the particular auxiliary shaft yI4 that haptool carrier head' I1 in known .manner which is pens `tobe in front of it. The shaft 4 is held in rotatably supported by thecentering ring 2.. For position in the manner described by means of the this purpose the member I1 is firmly united with. bolt 25 acting on the fork 28.

the bearing ring I8 by lscrews I8. The ring I9 ,i When pressureiis no longer exerted upon the 55 free end of the rod 39, the latter is pushed up by a spring 42, so that the lower. end of the rod 39 is brought out of range of the member 35 and the lever 38 is free to move about its bearing pin and can be adjusted to a horizontal position. It may then be inserted in one of the four claws 43, 44, 45, 46 provided on the upper side of the cover 3| which can thus be turned by the lever 38 to drive the tool carrier head I1 and bring another auxiliary shaft I4 in front of the driving shaft 4 so as to apply another tool or cutter. As the lever 36 can be successively brought into engagement with all four claws 43, 44, 45, 46 and can be swung about the axis of the tool carrier head, it can be used in a position most convenient to the operator.

The tool carrier head I1 is held in any position by a bolt 41 which can be introduced into a bore of the bearing ring vISI firmly united with the head I1 and is actuated by a pinion 48 that can be turned by means of the handle 49. A spring 50 presses the bolt into operative position.

The construction described can be varied in many ways. Above all, it is not absolutely necessary to use the lever 33 for turning the tool carrier head I1 which could also be operated by means of handles provided at the outer edge of the cover 3|. In this instance, the handle 49 could be connected by levers with the bell 30 and thereby with the fork 23 in such manner that during release of the tool carrier head I1 the shaft 4 would be simultaneously brought into inoperative position.

Coupling of the driving shaft with the auxillary shafts to be driven can be effected in any suitable manner. 'Ihe driving shaft 4 maybe disposed below the plane of the auxiliary shafts each of which may support a toothed or friction wheel which cooperates with a toothed or friction wheel on the free end of the shaft 4 when the turning of the tool carrier head has brought the auxiliary shaft concerned within range of the toothed or friction wheel disposed on the drivingshaft.

Instead of arranging it parallel to the auxiliary shaft to be driven the driving shaft could be disposed also vertically to the plane of the auxiliary shafts and provided with a conical toothed or friction wheel. If, in this instance, the axis of the driving shaft were positioned in the axis of rotation of the tool carrier head, all auxiliary shafts would be driven jointly. It would be necessary to cover those tools that were to remain inoperative by a plate whilst the working tool would be held up to the work. It would further be -possible to arrange the vertical driving shaft outside the axis of rotation of the tool carrier head, in which case only the auxiliary shaft would be driven through bevel or friction gears which was adjusted to the plane passing through the axes of the driving shaft and tool carrier head.

Furthermore, the auxiliary shaft coupled within the tool carrier head with the driving shaft may serve for driving anothershaft or spindle whose axis need not intersect the axis of the tool carrier head. This shaft or spindle could be disposed beside, above or below the auxiliary shaft driving it and extend even obliquely thereto.

I claim:

1. A machine tool, comprising a frame, a, rotatable tool carrier head, a plurality of tool spindles rotatably arranged in said head radially to the axis thereof, a bearing bracket disposed in said frame and encircled by said head, a tool driving shaft positioned in said bracket transversely to the pivot of said head, tool spindles disposed in said head, means for detachabiy coupling said driving shaft with the tool spindle coaxially adjusted relative to said driving shaft, and means for axially displacing the driving shaft, in the bearing bracket comprising a fork adjustably disposed in a recessed portion of the tool carrier head, a lever projecting from said head for operating said fork and a spherical covering on said fork to shut oli' the recess.

2. A machine tool, comprising a frame, a rotatable tool carrier head, a plurality of tool spindles rotatably arranged in said head radially to the axis thereof, a bearing bracket disposed in said frame and encircled by said head, a tool driving shaft positioned in said bracket transversely to the pivot of said head, tool spindles disposed in said head, means for detachably coupling said driving shaft with the tool spindle coaxially adjusted relative to said driving shaft, and means for axially displacing the driving shaft in the bearing bracket comprising a fork adjustably disposed in a recessed portion of the tool carrier head, a lever projecting from said head for operating said fork, a spherical covering on said fork to shut off the recess, a joint in Vsaid lever and claws on the upper side of the tool carrier head for receiving the reversed lever to adjust the head.

3. A machine tool, comprising a frame, a rotatable tool carrier head, a plurality of tool spindles rotatably arranged in said head radially to the axis'thereof, a bearing bracket disposed in said frame and encircled by said head, a tool driving shaft positioned in said bracket transversely to the pivot of said head, tool spindles disposed in said head, means for detachably coupling said driving shaft with the tool spindle coaxially adjusted relative to said driving shaft, and means for axially displacing the driving shaft in the bearing bracket comprising a' vfork adjustably disposed in a recessed portion of the tool carrier head, a lever projecting from said head foroperating said fork, a spherical covering on said fork to shut off the recess, a joint in said lever. claws on the upper side of the tool carrier head for receiving the reversed lever to adjust the head, means for locking the head in working position and means for connecting the fork with said locking means to release the head for adjustment during reversing of the lever.

FRIEDRICH GAITZSCH. 

